Nutritional reference values for Opuntia ficus‐indica determined by means of the boundary‐line approach |
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| Authors: | Fidel Blanco‐Macías Rafael Magallanes‐Quintanar Ricardo D Valdez‐Cepeda Rigoberto Vázquez‐Alvarado Emilio Olivares‐Sáenz Erasmo Gutiérrez‐Ornelas Juan A Vidales‐Contreras Bernardo Murillo‐Amador |
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| Institution: | 1. Universidad Autónoma Chapingo, Centro Regional Universitario Centro‐Norte, Cruz del Sur No. 100, Col. Constelación, Apdo. Postal 196, CP 98085, El Orito, Zacatecas, Zac., México;2. Universidad Autónoma de Nuevo León, Facultad de Agronomía, Km 17.5, Carretera Zuazua‐Marín, CP 66700. Marín, N.L., México;3. Universidad Autónoma de Zacatecas, Unidad Académica de Ingeniería Eléctrica, Ave. R. López Velarde 801, CP 98064, Zacatecas, Zac., México;4. Centro de Investigaciones Biológicas del Noroeste, Mar Bermejo No. 195, Col. Playa Palo de Santa Rita, La Paz, Baja California Sur, México |
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| Abstract: | Optimum concentrations and/or sufficiency ranges of nutrients are useful for a correct diagnosis and improvement of nutrient status of cultivated plants. To develop boundary‐line approach (BLA) standards for Opuntia ficus‐indica L., a database of N, P, K, Ca, and Mg concentrations in 1‐year‐old cladodes and cladodes fresh‐matter yield was used. The BLA optimum concentrations (associated with estimated maximum yield) for O. ficus‐indica were: N = 13.1 g kg–1, P = 3.2 g kg–1, K = 44.4 g kg–1, Ca = 38.1 g kg–1, and Mg = 17.3 g kg–1. The BLA sufficiency ranges at 95% yield were 8.4–20.3 g kg–1 for N, 2.4–4.2 g kg–1 for P, 38.2–50.8 g kg–1 K, 31.8–45.2 g kg–1 for Ca, and 14.3–20.9 g kg–1 for Mg. The BLA standards are comparable to those obtained in a previous study using compositional‐nutrient‐diagnosis (CND) approach. |
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| Keywords: | plant nutrition BLA standards CND norms nutrient norms yield |
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